JP2531014B2 - Tape deck - Google Patents
Tape deckInfo
- Publication number
- JP2531014B2 JP2531014B2 JP3351586A JP35158691A JP2531014B2 JP 2531014 B2 JP2531014 B2 JP 2531014B2 JP 3351586 A JP3351586 A JP 3351586A JP 35158691 A JP35158691 A JP 35158691A JP 2531014 B2 JP2531014 B2 JP 2531014B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- prism
- central prism
- tape
- central
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明はビデオカセット，オーデ
ィオカセット又はディジタル記録カセットなどを装着し
て記録又は再生などを行うビデオテープレコーダなどに
組み込まれるテープデッキに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape deck incorporated in a video tape recorder for recording or reproducing data by mounting a video cassette, an audio cassette, a digital recording cassette or the like.
【０００２】[0002]
【従来の技術】従来、磁気テープ終始端に透明なテープ
を連設させ、その透明テープを通過する発光体からの光
を受光体に入射させ、磁気テープ終始端を検出する技術
がある。2. Description of the Related Art Conventionally, there is a technique in which a transparent tape is continuously provided at the beginning and end of a magnetic tape, and light from a light emitter passing through the transparent tape is incident on a light receiver to detect the beginning and end of the magnetic tape.
【０００３】この場合、配線基板にホルダを立設させ、
該ホルダに発光体を取り付けてテープと略同一高さ位置
に配置させると共に、デッキシャーシに受光体を設けて
いるものである。In this case, the holder is erected on the wiring board,
A light-emitting body is attached to the holder so as to be arranged at substantially the same height as the tape, and a light-receiving body is provided on the deck chassis.
【０００４】[0004]
【発明が解決しようとする課題】上記のような従来技術
においては、配線基板にホルダを立設させ、該ホルダに
発光体を取り付けてテープと略同一高さ位置に配置させ
ていたから、配線基板の加工組立時、基板から突出する
ホルダを損傷させ易いと共に、デッキシャーシに設ける
受光体を配線基板に接続される配線が必要である等の構
造上及び組立作業上の問題があった。In the prior art as described above, since the holder is erected on the wiring board and the light emitter is attached to the holder and the holder is arranged at substantially the same height as the tape, the wiring board At the time of processing and assembling, there is a problem in structure and assembling work that the holder protruding from the board is easily damaged and the wiring for connecting the light receiving body provided on the deck chassis to the wiring board is required.
【０００５】また、上記問題点を解決するため、本出願
人において先に出願された実願平３−７９４９２号「テ
ープデッキ」におけるように、単に、テープ終始端を検
出する発光体及び受光体を備えるテープデッキにおい
て、発光体からの光を両側方に送出させる中央プリズム
と、中央プリズムからの光を受光体に案内する両側プリ
ズムとを設けるような構成を採ることは、両側プリズム
において中央プリズムからの受光が正確でなく、場合に
よっては受光量が少なくてテープ終始端を検出し得ない
という問題が生じる。Further, in order to solve the above problems, as in Japanese Patent Application No. 3-79492 "Tape Deck", which was previously filed by the present applicant, a light-emitting body and a light-receiving body which simply detect the beginning and end of the tape are used. In a tape deck equipped with a central prism for sending light from a light emitter to both sides and a double-sided prism for guiding light from the central prism to a light receiver, the central prism in the double-sided prism is adopted. There is a problem in that the light reception from the tape is not accurate, and in some cases the amount of light received is too small to detect the beginning and end of the tape.
【０００６】本発明は、上記事情に鑑みてなされたもの
であり、構造上及び組立作業上の問題を解決して配線基
板の加工組立作業の簡略化並びに配線の簡略化などを容
易に行い得、不良品の発生並びに製造コストなども容易
に低減でき、しかも、テープ終始端を確実に検出できる
テープデッキを提供することを目的とするものである。The present invention has been made in view of the above circumstances, and it is possible to easily solve the problems of the structure and the assembling work to simplify the working and assembling work of the wiring board and the wiring. It is an object of the present invention to provide a tape deck that can easily reduce the occurrence of defective products and manufacturing costs and can reliably detect the beginning and end of the tape.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、テープ終始端を検出する発光体及び受光
体を備え、該発光体からの光が縦長の検視孔を通過して
受光体に入射させる構造のテープデッキにおいて、発光
体からの光を両側方に送出させる中央プリズムと、中央
プリズムからの光を受光体に案内する両側プリズムとを
設けると共に、上記中央プリズム上端に前面視Ｘ形状の
反射面を設け、該中央プリズムと両側プリズムとの位置
が該中央プリズムの中心点を通る横軸に対して７度の位
置となるように中央プリズムと両側プリズムとを配置
し、且つ、該中央プリズムを時計方向に所定角度回転さ
せて取付けたことを特徴とするものである。In order to achieve the above object, the present invention comprises a light emitting body and a light receiving body for detecting the beginning and end of a tape, and the light from the light emitting body passes through a vertically long inspection hole.
In a tape deck having a structure for making light incident on a light receiving body, a central prism for sending light from a light emitting body to both sides and a both side prism for guiding light from the central prism to the light receiving body are provided, and a front surface is provided on an upper end of the central prism. Visual X shape
Positioning of the central prism and the prisms on both sides with a reflecting surface
Is about 7 degrees with respect to the horizontal axis passing through the center point of the central prism
The central prism and the prisms on both sides are arranged so that
In addition, the central prism is mounted by rotating it by a predetermined angle in the clockwise direction .
【０００８】[0008]
【作用】上記構成とすることにより、中央プリズム及び
両側プリズムをデッキシャーシ側に設けることで、発光
体及び受光体を配線基板に直付け固定させることがで
き、従来に比べて配線基板の加工組立作業の簡略化並び
に配線の簡略化などを容易に行うことができ、不良品の
発生並びに製造コストなども容易に低減できることとな
る。With the above structure, by providing the central prism and the prisms on both sides on the deck chassis side, the light emitting body and the light receiving body can be directly attached and fixed to the wiring board. The work can be simplified and the wiring can be simplified, and the occurrence of defective products and the manufacturing cost can be easily reduced.
【０００９】また、両側プリズムにおいては中央プリズ
ムからの受光が正確となり、受光量が増大してテープ終
始端を確実に検出することができるようになる。Further, in the double-sided prism, the light received from the central prism becomes accurate, the amount of received light increases, and the tape start and end can be detected with certainty.
【００１０】[0010]
【実施例】以下、本発明の実施例を図に基づいて説明す
る。図１は要部の正面説明図、図２はＶＨＳビデオテー
プレコーダの平面図、図３はＶＨＳビデオテープレコー
ダの底面図、図４はカセット装着を示す平面説明図、図
５はカセット装着を示す正面説明図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a front view of a main part, FIG. 2 is a plan view of a VHS video tape recorder, FIG. 3 is a bottom view of a VHS video tape recorder, FIG. 4 is a plan view showing cassette mounting, and FIG. 5 is cassette mounting. It is a front explanatory view.
【００１１】図において、１は平面視矩形状のデッキシ
ャーシ、２は録画再生ヘッドなどを取付ける回転自在な
ヘッドシリンダ、３，４はレール５，６を介して摺動案
内するスライド体７，８に立設させてＶＨＳビデオカセ
ット９の磁気テープ９ａを前記シリンダ２に巻装させる
テープローディングピン、１０，１１はカセット９のテ
ープリールを係合軸支させる供給及び巻取リール軸、１
２はオーディオ信号などを入出力させるヘッド、１３は
消去ヘッド、１４はキャプスタン、１５はピンチローラ
である。In the figure, 1 is a deck chassis having a rectangular shape in a plan view, 2 is a rotatable head cylinder for mounting a recording / playback head, and 3 and 4 are slide bodies 7 and 8 which slide and guide via rails 5 and 6. Tape loading pins 10 and 11 for vertically mounting the magnetic tape 9a of the VHS video cassette 9 on the cylinder 2 and supplying and winding reel shafts for supporting the tape reels of the cassette 9 as engaging shafts.
Reference numeral 2 is a head for inputting and outputting audio signals, 13 is an erasing head, 14 is a capstan, and 15 is a pinch roller.
【００１２】また、図中、１６は前記カセット９を支持
するカセットホルダ、１７，１８は前記シャーシ１上面
に立設させてカセット９出入位置乃至記録再生位置にカ
セットホルダ１６を移動自在に取付ける左右ガイド板、
１９は前記キャプスタン１４を回転させるテープ走行モ
ータ、２０はテープローディングレバー２１及びカセッ
トローディングギヤ２２，２２などを駆動するローディ
ングモータであり、ローディングモータ２０によってロ
ーディングレバー２１を摺動させて前記ローディングピ
ン３，４を往復動させると共に、ローディングモータ２
０によってローディングギヤ２２，２２を正逆転させて
前記カセットホルダ１６を往復動させるように構成して
いる。Further, in the figure, 16 is a cassette holder for supporting the cassette 9, 17 and 18 are erected on the upper surface of the chassis 1, and left and right for movably mounting the cassette holder 16 at the cassette 9 insertion / removal position or the recording / reproducing position. Guide plate,
19 is a tape running motor for rotating the capstan 14, 20 is a loading motor for driving the tape loading lever 21, the cassette loading gears 22, 22, etc. The loading motor 20 slides the loading lever 21 to load the loading pin. The reciprocating motion of 3 and 4 and loading motor 2
The loading gears 22 and 22 are rotated forward and backward by 0 to reciprocate the cassette holder 16.
【００１３】さらに、図１，図４及び図５に示す如く、
録画再生回路及びモータ制御回路などを形成する配線基
板２３を備え、該基板２３を前記シャーシ１下面にビス
２４止め固定させると共に、発光体である発光ダイオー
ド２５及び受光体であるフォトトランジスタ２６，２６
を前記基板２３に直付け固定させる。Further, as shown in FIGS. 1, 4 and 5,
A wiring board 23 for forming a recording / playback circuit and a motor control circuit is provided, and the board 23 is fixed to the lower surface of the chassis 1 with screws 24, and a light emitting diode 25 as a light emitting body and phototransistors 26, 26 as a light receiving body are provided.
Are directly attached and fixed to the substrate 23.
【００１４】また、四角柱形のアクリル樹脂製の中央プ
リズム２７を備え、インサート成形加工によって設けた
フック２８によってシャーシ１に中央プリズム２７を係
止固定させ、中央プリズム２７の下端面を前記発光ダイ
オード２５に対向配置させると共に、中央プリズム２７
の上端部に左右反射面２９，３０を形成し、中央プリズ
ム２７の反射面２９，３０を介して発光ダイオード２５
からの光を両側方に送出させるように構成している。A central prism 27 made of acrylic resin in the shape of a quadrangular prism is provided, and the central prism 27 is locked and fixed to the chassis 1 by a hook 28 provided by insert molding, and the lower end surface of the central prism 27 is the light emitting diode. 25 and the central prism 27
The left and right reflecting surfaces 29 and 30 are formed on the upper end of the light emitting diode 25 through the reflecting surfaces 29 and 30 of the central prism 27.
It is configured to send the light from the both sides.
【００１５】また、アクリル樹脂製の両側プリズム３
１，３２を備え、左右ガイド板１７，１８に一体形成し
たフック３３，３３を介して各ガイド板１７，１８外側
面に両側プリズム３１，３２を係止固定させ、両側プリ
ズム３１，３２の下端面をフォトトランジスタ２６，２
６に対向配置させるもので、録画再生位置のカセット９
の検視孔３３ａ，３３ａ，３４，３４と、カセットテー
プ９ａ終始端の透明テープ３５，３６とを介し、発光ダ
イオード２５の光を、中央プリズム２７から両側プリズ
ム３１，３２に送出させ、フォトトランジスタ２６，２
６に入射させ、テープ９ａの終端及び始端を検出させる
ように構成している。Further, both side prisms 3 made of acrylic resin
1, 32, and both side prisms 31, 32 are locked and fixed to the outer surfaces of the guide plates 17, 18 via hooks 33, 33 integrally formed on the left and right guide plates 17, 18, respectively. Phototransistors 26 and 2 on the end face
The cassette 9 at the recording / playback position is arranged to face 6
The light of the light emitting diode 25 is sent from the central prism 27 to the both side prisms 31, 32 through the inspection holes 33a, 33a, 34, 34 of the cassette and the transparent tapes 35, 36 at the beginning and end of the cassette tape 9a, and the phototransistor 26. , 2
6 is made incident, and the end and the start of the tape 9a are detected.
【００１６】また、図１の如く、中央プリズム２７上端
の各反射面２９，３０を前面視でＸ形に交叉させて形成
し、縦長の長円に形成されるカセット９両側の検視孔３
４，３４の上下幅に対向させて各反射面２９，３０の上
下幅を容易に大きく形成できるように構成すると共に、
右側のプリズム３２のようにクランク形に折曲げ形成
し、他の部品を迂回するように延出させることも行え
る。Further, as shown in FIG. 1, each of the reflecting surfaces 29, 30 at the upper end of the central prism 27 is formed by intersecting in an X shape in a front view, and is formed into a vertically long oval.
The upper and lower widths of the reflecting surfaces 29, 30 can be easily formed to be large by facing the upper and lower widths of 4, 34.
It is also possible to bend it into a crank shape like the prism 32 on the right side and extend it so as to bypass other parts.
【００１７】ところで、中央プリズム２７と両側プリズ
ム３１，３２との位置関係は平面視した場合図６に示す
ような状態が標準状態とされている。即ち、中央プリズ
ム２７の中心点Ｏを通る直交軸のうち縦軸をＹ軸，横軸
をＸ軸とすると、両側プリズム３１，３２はＸ軸に対し
て角度が７度（ＪＩＳ規格による）傾いて取付けられて
いる。By the way, the positional relationship between the central prism 27 and the two-sided prisms 31, 32 is the standard state as shown in FIG. 6 when seen in a plan view. That is, when the vertical axis is the Y axis and the horizontal axis is the X axis of the orthogonal axes passing through the center point O of the central prism 27, the two-sided prisms 31 and 32 are inclined at an angle of 7 degrees (according to the JIS standard) with respect to the X axis. Installed.
【００１８】従って、中央プリズム２７においては、そ
の発光面２７ａ，２７ｂもＸ軸に対して７度の角度を有
して形成されている（図７参照）。しかしながら、この
状態だと下部の発光ダイオード２５からの光は矢印中
Α，Βで示す如く、中央プリズム２７の中心点Ｏよりず
れて発光面２７ａ，２７ｂに添って進むため、左側のプ
リズム３１においてはその中心より下側に集光すること
となり、また、右側のプリズム３２においてはその中心
より上側に集光することとなる。Therefore, in the central prism 27, the light emitting surfaces 27a and 27b are also formed with an angle of 7 degrees with respect to the X axis (see FIG. 7). However, in this state, the light from the light emitting diode 25 on the lower side travels along the light emitting surfaces 27a and 27b deviating from the center point O of the central prism 27, as indicated by the arrows A and B in the arrow, so that the prism 31 on the left side Will be condensed below the center thereof, and in the right prism 32, will be condensed above the center thereof.
【００１９】即ち、この配置状態では、両側プリズム３
１，３２において中央プリズム２７からの受光が正確で
なく、場合によっては受光量が少なくてテープ９ａ終始
端を検出し得ないという事態が生じる。That is, in this arrangement, the prisms 3 on both sides are
In cases 1 and 32, the light received from the central prism 27 is not accurate, and in some cases, the amount of light received is too small to detect the leading and trailing ends of the tape 9a.
【００２０】そこで、図６の状態から図８に矢印Ｄで示
すように、中央プリズム２７を時計方向に所定角度（本
実施例では０．８度）回動させて取付ける（図８参
照）。この場合、中央プリズム２７においては、その発
光面２７ａ，２７ｂはＸ軸に対してそれぞれ７．８度，
６．２度となる（図９参照）。Therefore, as shown by an arrow D in FIG. 8 from the state of FIG. 6, the central prism 27 is rotated clockwise by a predetermined angle (0.8 degrees in this embodiment) to be attached (see FIG. 8). In this case, in the central prism 27, the light emitting surfaces 27a and 27b are respectively 7.8 degrees with respect to the X axis,
It becomes 6.2 degrees (see FIG. 9).
【００２１】こうすると、下部の発光ダイオード２５か
らの光は中央プリズム２７の各反射面２９，３０を経て
矢印Ｅ，Ｆで示す如く、発光面２７ａ，２７ｂに添って
進むため、両側プリズム３１，３２においては丁度その
中心付近に受光することができてテープ終始端を確実に
検出することが可能となる。In this way, the light from the lower light emitting diode 25 travels along the light emitting surfaces 27a and 27b as shown by arrows E and F through the reflecting surfaces 29 and 30 of the central prism 27. In the case of 32, the light can be received exactly in the vicinity of the center thereof, and the tape start and end can be surely detected.
【００２２】[0022]
【発明の効果】以上述べた如く、本発明によれば、テー
プ終始端を検出する発光体及び受光体を備えるテープデ
ッキにおいて、発光体からの光を両側方に送出させる中
央プリズムと、中央プリズムからの光を受光体に案内す
る両側プリズムとを設けると共に、中央プリズムの各発
光面を対応する両側プリズム側へ所定角度回動させて取
付けたので、中央プリズム及び両側プリズムをデッキシ
ャーシ側に設けることにより、発光体及び受光体を配線
基板に直付け固定させることができ、配線基板の加工組
立作業の簡略化並びに配線の簡略化などを容易に行うこ
とができ、不良品の発生並びに製造コストなども容易に
低減できる。また、両側プリズムにおいては中央プリズ
ムからの受光量を大きくすることができ、テープ終始端
を確実に検出することができる。As described above, according to the present invention, in a tape deck provided with a light emitter and a light receiver for detecting the end of the tape, a central prism for sending light from the light emitter to both sides and a central prism. A prism on both sides that guides the light from the to the light receiver is provided, and each light emitting surface of the central prism is attached by rotating it to the corresponding prism on both sides by a predetermined angle, so that the central prism and the prisms on both sides are provided on the deck chassis side. By doing so, the light emitter and the light receiver can be directly attached and fixed to the wiring board, which simplifies the work of assembling and assembling the wiring board, and simplifies the wiring, thereby causing defective products and manufacturing costs. Can be easily reduced. Further, in the both-side prism, the amount of light received from the central prism can be increased, and the tape start and end can be reliably detected.
【図１】本発明に係る要部の正面説明図である。FIG. 1 is a front explanatory view of a main part according to the present invention.
【図２】本発明に係るビデオテープレコーダの平面図で
ある。FIG. 2 is a plan view of a video tape recorder according to the present invention.
【図３】本発明に係るビデオテープレコーダの底面図で
ある。FIG. 3 is a bottom view of the video tape recorder according to the present invention.
【図４】本発明に係るカセット装着を示す平面説明図で
ある。FIG. 4 is a plan view showing the mounting of the cassette according to the present invention.
【図５】本発明に係るカセット装着を示す正面説明図で
ある。FIG. 5 is a front view showing the mounting of the cassette according to the present invention.
【図６】本発明に係る比較状態の要部の平面説明図であ
る。FIG. 6 is an explanatory plan view of a main part in a comparison state according to the present invention.
【図７】図６の中央プリズムの拡大平面図である。FIG. 7 is an enlarged plan view of the central prism shown in FIG.
【図８】本発明に係る実施例の要部の平面説明図であ
る。FIG. 8 is an explanatory plan view of a main part of an embodiment according to the present invention.
【図９】図８の中央プリズムの拡大平面図である。9 is an enlarged plan view of the central prism of FIG.
９ａ テープ ２５ 発光ダイオード（発光体） ２６ フォトトランジスタ（受光体） ２７ 中央プリズム ２７ａ，２７ｂ 発光面 ３１，３２ 両側プリズム 9a Tape 25 Light emitting diode (light emitting body) 26 Phototransistor (light receiving body) 27 Central prism 27a, 27b Light emitting surface 31, 32 Bilateral prism
Claims (1)
体を備え、該発光体からの光が縦長の検視孔を通過して
受光体に入射させる構造のテープデッキにおいて、発光
体からの光を両側方に送出させる中央プリズムと、中央
プリズムからの光を受光体に案内する両側プリズムとを
設けると共に、上記中央プリズム上端に前面視Ｘ形状の
反射面を設け、該中央プリズムと両側プリズムとの位置
が該中央プリズムの中心点を通る横軸に対して７度の位
置となるように中央プリズムと両側プリズムとを配置
し、且つ、該中央プリズムを時計方向に所定角度回転さ
せて取付けたことを特徴とするテープデッキ。1. A light-emitting body and a light-receiving body for detecting the beginning and end of the tape, wherein light from the light-emitting body passes through a vertically long inspection hole.
In a tape deck having a structure for making light incident on a light receiving body, a central prism for sending light from a light emitting body to both sides and a both side prism for guiding light from the central prism to the light receiving body are provided, and a front surface is provided on an upper end of the central prism. Visual X shape
Positioning of the central prism and the prisms on both sides with a reflecting surface
Is about 7 degrees with respect to the horizontal axis passing through the center point of the central prism
The central prism and the prisms on both sides are arranged so that
A tape deck , wherein the central prism is mounted by rotating the central prism clockwise by a predetermined angle.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3351586A JP2531014B2 (en) | 1991-12-11 | 1991-12-11 | Tape deck |
| DE4229043A DE4229043A1 (en) | 1991-09-03 | 1992-09-01 | TAPE COVER DETECTING DEVICE |
| GB9218598A GB2259804B (en) | 1991-09-03 | 1992-09-02 | A tape end detecting device |
| GB9507198A GB2287575B (en) | 1991-09-03 | 1992-09-02 | A tape end detecting device |
| GB9521098A GB2292475B (en) | 1991-09-03 | 1992-09-02 | A tape end detecting device |
| FR9210490A FR2683662B1 (en) | 1991-09-03 | 1992-09-02 | END OF BAND DETECTION DEVICE FOR MAGNETIC BAND PLATE. |
| US07/939,933 US5311030A (en) | 1991-09-03 | 1992-09-02 | Tape end detecting device for tape decks using center and side prisms for directing light |
| SG1996006355A SG49800A1 (en) | 1991-09-03 | 1992-09-02 | Photo-electric end of tape detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3351586A JP2531014B2 (en) | 1991-12-11 | 1991-12-11 | Tape deck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05166253A JPH05166253A (en) | 1993-07-02 |
| JP2531014B2 true JP2531014B2 (en) | 1996-09-04 |
Family
ID=18418276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3351586A Expired - Fee Related JP2531014B2 (en) | 1991-09-03 | 1991-12-11 | Tape deck |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2531014B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0652592B2 (en) * | 1986-01-14 | 1994-07-06 | 松下電器産業株式会社 | Recording / playback device |
| JPH0519861Y2 (en) * | 1986-10-20 | 1993-05-25 |
-
1991
- 1991-12-11 JP JP3351586A patent/JP2531014B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05166253A (en) | 1993-07-02 |
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